United States. Download the latest version of Adobe Reader, free of charge. Ground [1] The United States Geological Survey (USGS) estimated that 15,000 people experienced severe shaking, 106,000 people felt very strong shaking, 176,000 felt strong shaking, and 738,000 felt moderate shaking. Bay Area leaders discuss earthquake preparedness. Contributed by NC 4 ; Felt Report - Tell Us! We analyze centimeter-scale accuracy mobile laser scanning (MLS) data of deformed vine rows within ±300 m of the principal surface expression of the M (magnitude) 6.0 2014 South Napa earthquake. [5] Thirteen of those injured were admitted. The South Napa Earthquake caused extensive damage through both ground shaking and surface cracking (rupture). [25][26], Several of the historic buildings damaged in the earthquake have been repaired while others are still awaiting renovation and restoration. Two deaths resulted (2). Education and Outreach Best Practices Team of DR-4193-CA, the South Napa Earthquake Disaster. South Napa M 6.0 Earthquake Rev. [16] Six major fires broke out,[9] and four homes in Napa Valley Mobile Home Park located in north Napa were destroyed. 0 . Secure .gov websites use HTTPS The use of InSAR was invaluable for identifying and mapping secondary traces with small displacements, and for delineating the overall details of the extensive rupture. It was also reported that the estimate for damage to the City's infrastructure had reached $57.9 million. Only part of the West Napa Fault broke open. Interviews with members of households affected by the South Napa earthquake indicated that in addition to exten- sive property damage, many members of the community experienced injuries or mental health stressors, or both, and these findings suggest immediate public health and future preparedness priorities for affected communities. Field observations and maps were integrated with airborne imagery, lidar, and InSAR to produce a comprehensive, large-scale digital map of fault rupture and zones of ground deformation. 64, No. [15] Several newer commercial buildings also suffered damage. A lock ( Share sensitive information only on official, secure websites. Contributed by NC 4 ; Regional Information. Federal assistance took over two months to be made available after the earthquake, meaning residents had to financially cope on their own for 60 days. [21] Estimates of the damage to the wine industry were downgraded to between $80 and $100 million in a September 5, 2014 report from Silicon Valley Bank to the Napa County Board of Supervisors. Many streams and springs, which were dry or nearly dry before the 2014 Mw6.0 South Napa earthquake, started to flow after the earthquake. 10-20 seconds: The length of the earthquake, which hit about six miles south of Napa… A state of emergency remained in effect following the South Napa Earthquake, which struck about 3:20 a.m. local time Sunday, according to the U.S. Geological Survey. Because of its role in the California economy and its stagnant economic growth, the Napa earthquake is going to create large challenges - in addition to those caused by the drought … Official websites use .gov The map, observations, and photo database are summarized here in appendixes and figures and are also available as a series of digital data products within a companion U.S. Geological Survey data release (Ponti and others, 2019); the characteristics of fault rupture and ground deformation features are summarized in detail in the body of this report. After incorporating feedback from the field test, the survey tool will be ready for deployment in the next major earthquake. Scientists have gathered at the USGS headquarters in Menlo Park to review the effects of the South Napa Earthquake. President Obama declared the South Napa Earthquake a major disaster on September 11, 2014 3. [11] The earthquake was the largest earthquake in the Bay Area since the magnitude 6.9 1989 Loma Prieta earthquake. Gov. Napa households reported that the condition worsened, with 32% seeking additional medical care, whereas western Vallejo households reported fewer worsening conditions (28%) and seeking of medical care (6%). Maximum coseismic slip was greater than 40 cm and possibly as great as 60 cm, with the slip maximum located about 10 km north of the epicenter. Deformation characteristics of these features were not consistent with either primary faulting or shaking-induced ground failure and remain enigmatic, although this report includes speculation about possible origins. At least twelve aftershocks followed, including one of magnitude 3.9. On August 24, 2014, the northern San Francisco Bay Area was struck by the largest earthquake to impact the Bay Area since the 1989 M6.9 Loma Prieta earthquake. The 24 August 2014 Mw 6.0 South Napa, California earthquake produced significant offsets on 12 borehole strainmeters in the San Francisco Bay area. [24] Many of the injuries were lacerations and abrasions from fallen debris. Most of the fault slip, and all the afterslip, occurred on the 21-km-long westernmost trace (Trace A). [18], Following the first round of building inspections by the City of Napa inspectors, a total of 613 structures had been tagged; 113 were red-tagged and 500 had been yellow-tagged. Ongoing fault movement along the surface rupture, called afterslip, continued for several months, and caused further damage to foundations and structures. Governor Brown declared a state of emergency on August 24 2, … Injuries and Traumatic Psychological Exposures Associated with the South Napa Earthquake — California, 2014 MMWR Weekly Vol. The South Napa earthquake produced rare fissures. The California Disaster Assistance Act generally provides that the state share for disaster project allocations to local agencies is no more than 75% of total state eligible costs, except for specified events for which the state share is up to 100% of state eligible costs. At 6.0 on the moment magnitude scale and with a maximum Mercalli intensity of VIII (Severe), the event was the largest in the San Francisco Bay Area since the 1989 Loma Prieta earthquake. The event was then the largest in the San Francisco Bay Area since the 1989 Loma Prieta earthquake, which measured 6.9 on the moment magnitude scale, but was later surpassed by the 2014 South Napa earthquake. M 6.0 - South Napa. Injuries and Traumatic Psychological Exposures Associated with the South Napa Earthquake - California, 2014. Total damage in the southern Napa Valley and Vallejo areas was in the range of $362 million to $1 billion, with one person killed and 200 injured. The system would cost $80 million in funding to run for five years in California, or $120 million for the whole West Coast. It is one of the first damaging earthquakes to strike a major metropolitan area in the State of … South Napa Earthquake Links: USGS event page. The San Andreas Fault System is an active plate boundary comprising right-lateral strike-slip faults that runs nearly the length of California. J.L. Catalog MMI Source Description check NC VIII ATLAS 3 ShakeMap Atlas v4 ATLAS VIII ATLAS 3 NORTHERN CALIFORNIA NC VIII NC 4 6.4 km (3.9 mi) … The earthquake was the largest to affect the San Francisco Bay area in 25 years and caused significant damage in Napa and Solano counties, including widespread power outages, five residential fires, and damage to roadways, waterlines, and 1,600 buildings (2). One person died September 5 as a result of injuries from the quake. 2.4 magnitude earthquake 2020-12-04 10:55:59 UTC at 10:55 December 04, 2020 UTC Location: Epicenter at 38.815, -122.812 7.2 km from Cobb (4.2 miles) The Data Map displays earthquake damage and impact observations from EERI field teams and other contributors using EERI's Photo Upload … The quake damaged many buildings, causing injury to over 170 citizens, power outages, fire hazard, and infrastructure failure. Potential-field data indicate that the M6.0 South Napa earthquake and its aftershocks were influenced by complex structure among the West Napa-Carneros-Pinole-Franklin faults system. Other aspects of the event included an experimental earthquake warning system that alerted seismologists several seconds before the damaging shear waves arrived, temporary changes in springs and wells, and the potential for postseismic fault creep. The moderate earthquake that struck California’s Napa Valley on Sunday collapsed older buildings, sparked fires and caused scores of injuries. Governor Brown declared a state of emergency on August 242, and President Obama declared the South Napa Earthquake a major disaster on September 11, 20143. Disaster relief: South Napa Earthquake. [3] Several wineries including Hess Collection and Trefethen Vineyards suffered damage to buildings and infrastructure. The South Napa earthquake response was one of the first times when post-earthquake reconnaissance data were mostly collected and disseminated electronically. … [13], Several older commercial buildings in downtown Napa showed signs of extensive external damage even though many had been retrofitted for earthquake safety protection. Following the event, geologists made more than 1,200 field observations at locations where tectonic faulting and ground failure produced visible deformation that fractured and disturbed the ground surface. … Governor Brown declared a state of emergency on August 24, 2014 2. The system being developed at the Berkeley Seismological Laboratory (called ShakeAlert) in conjunction with the United States Geological Survey, the California Institute of Technology and the University of Washington, will eventually cover the entire West Coast. A water main on Mare Island broke. Nearly two years ago, on August 24, 2014, just south of Napa, California, a fault in the Earth suddenly slipped, violently shifting and splitting huge blocks of solid rock, 6 miles below the surface. The Mw 6.0 South Napa earthquake of August 24, 2014, produced complex and extensive surface faulting and other ground deformation features. The authors of a separate study that focused on Global Positioning System data gave an estimated slip rate of 4±3mm/yr for the West Napa Fault. The epicenter was located approximately 9 km south of the city of Napa in northern California. In addition, the water levels of several wells in the Sonoma Valley rose suddenly at the time of the quake, in one instance by 5 feet (1.5 m). Following the event, geologists made more than 1,200 field observations at locations where tectonic faulting and ground failure produced visible deformation that fractured and disturbed the ground surface. If the entire fault had ripped, the earthquake would have been more powerful. VIII mmi. The “South Napa Earthquake” is the largest earthquake to have affected the Bay Area since the 1989 Loma Prieta earthquake. [27] The congregation of the First Presbyterian Church moved back into the sanctuary in July 2016 following repairs and restoration at a cost of $850,000. [20], Within days, County officials estimated the damage at $362 million. The moderate earthquake that struck California’s Napa Valley on Sunday collapsed older buildings, sparked fires and caused scores of injuries. The quake was the strongest to strike the Bay Area since the 6.9 Loma the documents to your computer and open them with Adobe Reader. Full Story. 2 . [7][8], The mainshock was magnitude 6.0, with a depth of 11.3 km. Seismic Warning Systems, Inc., a private earthquake warning company based in Scotts Valley, CA, had installed on-site warning systems at five fire stations in Vallejo in 2002 and 2003. COVID-19 holiday risk: The safest and most dangerous activities . about viewing, downloading, and printing report files can be found here. Earthquake warning systems could potentially give people time to take cover in the event of a quake, preventing injuries caused by falling debris, automatically stopping trains or shutting off gas lines. The transit impact of the South Napa earthquake, as reported by Bay City News: Amtrak's Capitol Corridor train service has been temporarily suspended this morning between Sacramento and San Jose while crews inspect the tracks for damage following the earthquake early this morning near American Canyon. 9 . Geotripper: Magnitude 6.0 Quake in Northern California - … The results of this compilation reveal that faulting occurred within a 2-km-wide zone on six, roughly parallel traces within the West Napa Fault System. Although the structure of the Uptown Theater was determined to be sound, the building was red-tagged due to damage to the theater's ceiling. SOUTH NAPA EARTHQUAKE. Director, Earthquake Science Center—Menlo ParkU.S. The Mw 6.0 South Napa earthquake of August 24, 2014, produced complex and extensive surface faulting and other ground deformation features. browser may not display or print as intended. 2014-08-24 10:20:44 (UTC) 38.215°N 122.312°W; 11.1 km depth; Did You Feel It? Keywords: resilience; recovery; businesses; reconnaissance; earthquakes . Residential structures and wineries surrounding this area were significantly damaged. Several of these regions had no visible ground deformation, whereas others did produce features that were inconsistent with tectonic faulting, so care must be taken not to over interpret the InSAR data without careful, corroborating field investigations. ) or https:// means you’ve safely connected to the .gov website. This bill would add the August 24, 2014, South Napa Earthquake, Earthquake to the list of events for which the state share of state eligible cost is up to 100%. [24] In Vallejo, 49 people were injured, including two who were hospitalized. Napa courthouse opens for the first time since 2014 earthquake. The “South Napa Earthquake” is the largest earthquake to have affected the Bay Area since the 1989 Loma Prieta earthquake. Most are … Caption: A map shows the location of the August 24, 2014 earthquake just south of Napa, California. 3:20 a.m.: The time the earthquake rattled residents awake across the region. These strainmeters are located between 24 and 80 km from the source, and the observed offsets ranged up to 400 parts per billion (ppb), which exceeds their nominal precision by a factor of 100. PDF documents opened from your The West Napa and Carneros faults, although considered to be minor Quaternary players within the San Andreas fault system, are major faults that in part bound the Mayacamas Mountains, an uplifted block of … On Sunday, August 24, 2014 at 3:20 a.m. (local time) a magnitude 6.0 earthquake struck near Napa, California. Initially this was reported to be a 10-second warning in Berkeley,[39][40] but revised information indicates only a 5-second warning was provided. TABLE 1. South Napa Earthquake today, M 6.0-6.1--geologic context Building destroyed in Napa. More than 170 … [44], 24 August 2014 earthquake centered in Napa, California, USA, "M6.0 – 6km NW of American Canyon, California", "Napa quake damage rises to $362 million", Napa, Calif., earthquake: Economic hit could reach $1 billion, "Napa's people, buildings hit hard by 6.0 earthquake", "Boats, grapes and Poseidon at Napa quake's epicenter", "The Mw 6.0 24 August 2014 South Napa Earthquake", "Northern California earthquake is area's strongest in 25 years", "After earthquake near Napa, up to 100 homes labeled unfit to enter", "Strong Earthquake Shakes Northern California", "Napa quake: Obama declares major disaster, freeing up aid", "Earthquake damage repaired, Napa's Native Sons building shines again", Northern California earthquake: Blue-collar Vallejo hit hard, "Earthquake cracks, buckles roads, but leaves bridges OK", "Wine industry tallies spilled wine, shattered barrels", "Napa quakes causes $80 million blow to wine industry, report says", "Napa tallies earthquake damage across city", "Napa earthquake death: 2 weeks later, quake claims first victim -", "First earthquake-related death reported", "Crumbled by Napa earthquake, Uptown Theatre mural rises again", "First Presbyterian church returns to quake-damaged sanctuary after almost two years", "After earthquake repairs, Napa Methodist church to reopen Sunday", "Napa awards repair contract for quake-damaged Goodman Library", "Napa's old post office sold for $2 million for a hotel", "Repair of earthquake damage to Napa courthouse to start soon", "Trefethen rebounds after the earthquake", "Napa quake jumpstarts stream flows, though probably only temporarily", "Surprise bonanza since Napa quake: dry creeks now flowing", "After big quake, Napa fault could move 6 inches in 3 years", "Napa's surprise fault line triggers earthquake study of the region", "Experimental warning system gave 10-second alert before California earthquake", "In Latest Calif. Earthquake, Shake Alert Tests Its Legs", "Expanding Earthquake Warning System May Help the Public", "California receives U.S. funding for earthquake early-warning system- LA Times", SCEC's Response to the South Napa Earthquake, The August 24, 2014 South Napa Earthquake: What Is Known So Far, Accessing Open Information And Preliminary Ground Motion Simulations, California earthquake strikes San Francisco Bay area, Quake rocks California wine country, dozens injured, Mapping of the West Napa Fault Zone for input into the Northern California Quaternary fault database, Study: 2014 Napa quake may be linked to groundwater changes, https://en.wikipedia.org/w/index.php?title=2014_South_Napa_earthquake&oldid=993842594, Creative Commons Attribution-ShareAlike License, This page was last edited on 12 December 2020, at 19:52. Please tell us about your experience. [18] CNN reported one individual still in critical condition, later discovery determined as a 58-year-old male who went through two surgeries, awakening four days later in ICU to discover it was going to take him approximately two years to learn how to walk again. The disaster was declared on September 11, 2014. Earthquake-related fault slip in the upper hundreds of meters of Earth’s surface has remained largely unstudied because of challenges measuring deformation in the near field of a fault rupture. All earthquake… Also, Brief Report for West Napa fault, Browns Valley section. Citizen Scientist Contributions ; Did You Feel It? This report is an overview of The United States Geological Survey (USGS) estimated that 15,000 people experienced severe shaking, 106,000 people felt very strong shaking, 176,000 felt strong shaking, and 738,000 felt moderate shaking. ShakeMap. The West Napa Fault transfers slip between a group of related faults (including the Concord Fault and the Calaveras Fault) called the Contra Costa Shear Zone, which was assigned a maximum slip rate of 1mm/yr in the third Uniform California Earthquake Rupture Forecast. (PDF). [31] The United States Postal Service determined that repairing the building would be too costly and sold it to a developer for $2 million. An official website of the United States government. [34], The event was credited with large, temporary increases in the water flow of several nearby streams, including Carriger Creek, Calabasas Creek, Felder Creek, Sonoma Creek, Tulocay Creek, Green Valley Creek, and Wild Horse Creek. 4 . Stability of rapid finite-fault inversion for the 2014 Mw6.1 South Napa earthquake Yong Zhang1, Rongjiang Wang2, and Yun-Tai Chen1,3 1School of Earth and Space Sciences, Peking University, Beijing, China, 2Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany, 3Institude of Geophysics, China Earthquake Administration, Beijing, China Jerry Brown declared a state of emergency following the South Napa earthquake, which struck at 3:20 a.m. Sunday, according to the U.S. Geological Survey. 1 . Revising archival accounts of the 1898 earthquake, I estimate a lower intensity magnitude, 5.8, than the value in the current Uniform California Earthquake Rupture Forecast (UCERF) catalog (6.4). Part or all of this report is presented in Portable Document Format But the South Napa earthquake could have been worse. Through an online survey, interviews, and home inspections, a large amount of new data were collected about the characteristics of Napa area houses and the effects 2014-08-24 10:20:44 (UTC) 38.215°N 122.312°W; 11.1 km depth; Interactive Map . The rupture has an average rupture velocity of 3.0 km/s and a peak slip of 2.24 m. Figures 3 a– 3 c show the spatial distributions of slip, rise time, and average slip rate, respectively. The South Napa earthquake along the San Andreas Fault reached 6.0, caused roughly $1 billion in damage, injured 200, killed one and jolted plenty of nerves. [23], About 200 injured people were treated at Queen of the Valley Medical Center in Napa. affected by the August 24, 2014 South Napa M6.0 earthquake. [9] The Goodman Library, Napa County Courthouse Plaza, Sam Kee Laundry Building, Downtown U.S. Post Office, Alexandria Hotel and Annex, Native Sons of the Golden West building,[14] First United Methodist Church, and First Presbyterian Church all suffered moderate to extensive damage. The South Napa earthquake taught us some valuable lessons: We can't always rely on government assistance. [42] These systems commanded the bay doors to open at these fire stations between 1.7 and 2.4 seconds before the S-waves arrived at each fire station. Geological Survey345 Middlefield Road, MS 977Menlo Park, CA 94025. Another 900 to 1,000 properties have yellow tags. [17] In Vallejo, several hundred storefront windows shattered and many building walls suffered extensive damage. The earthquake's epicenter was located about six miles south-southwest of Napa and 51 miles west-southwest of Sacramento. [29][30] A $1.75 million contract to repair damage to the Goodman Library was awarded in January 2017 and work on the building is expected to be completed in early 2018. The 2014 South Napa earthquake provides an opportunity to reconsider the Mare Island earthquake of 31 March 1898, which caused severe damage to buildings at a Navy yard on the island. [41] This means the S-waves had already arrived in Napa and Vallejo when the warning was issued. Attfield KR, Dobson CB, Henn JB, Acosta M, Smorodinsky S, Wilken JA, Barreau T, Schreiber M, Windham GC, Materna BL, Roisman R. On August 24, 2014, at 3:20 a.m., a magnitude 6.0 earthquake struck California, with its epicenter in Napa County (1). At a few locations, large-scale, detailed, field-based maps of fault rupture and ground deformation were produced. [32] An $11.6 million contract for restoration of the courthouse was awarded by Napa County in August 2017. [10] Governor Jerry Brown declared a state of emergency due to the severe damage and the possibility of aftershocks. Officials ride Napa Valley Wine Train to spur tourism. The developer plans to turn the building into a hotel. The mainshock was magnitude 6.0, with a depth of 11.3 km. Catalog CDI Responses Source check NC VIII 41269 US 5 . Open-File Report The Uptown Theater was the first to reopen on November 9, 2014. The epicenter of that earthquake was 20 km (12 mi) NNW of the South Napa epicenter, and also on the West Napa fault system. Artist impression of Chicxulub impact. [35][36], In the following months, geologists studying the effects of the event warned that a potential afterslip could cause the previously unmapped portion of the fault in the Browns Valley area of Napa to slowly move up to another 6 inches (150 mm) in the next 3 years.[37][38]. Strong shaking occurred in the epicentral region, but low level shaking extended throughout the San Francisco Bay area. LockA locked padlock Ponti, D.J, Rosa, C.M, and Blair, J.L., 2019, The Mw 6.0 South Napa earthquake of August 24, 2014—Observations of surface faulting and ground deformation, with recommendations for improving post-earthquake field investigations: U.S. Geological Survey Open-File Report 2019–1018, 50 p., 15 appendixes, https://doi.org/10.3133/ofr20191018. City Staff reported that 156 commercial and residential structures had been red-tagged and 1398 had been yellow-tagged. Responses. South Napa earthquake is our “wake-up call” to renew investment and action to enhance the seismic resilience of communities, businesses, and residents across the state. The South Napa earthquake of August 24, 2014 caused the strongest shaking in the San Francisco Bay area since the 1989 Loma Prieta earthquake, 25 years earlier. InSAR data also highlighted other areas with possible ground deformation—some of which are found coincident with previously mapped fault traces, whereas others are in areas where no faults were previously mapped. The earthquake was the largest earthquake in the Bay Area since the magnitude 6.9 1989 Loma Prieta earthq… [19] Pavement on several roads in Napa, Solano and Sonoma Counties buckled and cracked during the quake. The epicenter of the earthquake was located to the south of Napa and to the northwest of American Canyon on the West Napa Fault.[6]. [43] In December 2014, United States Congress approved a $5 million allocation as part of the Consolidated Appropriations Act, 2014 in order to expand funding for development of the system. 6 . M6.0 South Napa Earthquake M6.0 South Napa Earthquake. Nicholas Dillon was gravely injured after many bricks from a chimney fell on him. [5], All of these buildings are listed on the National Register of Historic Places, as is the Thomas Earl House, a historic residence that was badly damaged. Artist unknown. In Napa, 62 properties remain red-tagged, meaning they are too dangerous to access. On Sunday, August 24, 2014 at approximately 3:20 AM local time, a 6.0 magnitude earthquake was felt across South Napa Valley and the San Francisco Bay area. Several wine storage facilities also suffered damage and loss of property. 1: 11 Oct 2014 24 August 2014 M w 6.0 S. Napa Earthquake SPA Reconnaissance Report . Effects of the earthquake were widely observed across the Napa Valley region from Vallejo and Mare Island in the South to the North end of Napa Valley. The magnitude 6.0 South Napa Earthquake of August 24, 2014, took the lives of two people, injured 300 others, and caused moderate to severe damage to more than 2,000 structures. The incident period was from August 24, 2014 to September 7, 2014. [12] President Obama declared a major disaster for Napa and Solano counties. In a new report, scientists from MIT and elsewhere detail how, even after the earthquake’s main tremors and aftershocks died down, earth beneath the surface was still actively shifting and creeping — albeit much more slowly — for at least four weeks after the main event. South Napa Quake: The Facts A 6.0-magnitude earthquake with an epicenter at the southern edge of Napa struck at 3:20 a.m on Sunday, Aug. 24, 2014. The advantages and opportunities these new methods bring to our research also pose new challenges to large-scale compilation efforts and demonstrate the value of developing guidelines and better standardization across the community to more optimally utilize developing technology in future post-earthquake investigations. State Sen. Bill Dodd issued a … In addition, a M3.0 earthquake … Home; Resources; Photo Gallery; Data Map; How to Contribute ; About; Donate; View geolocated imagery and data collected for this earthquake in two ways: DATA MAP. [2] According to an early estimate by the USGS, the economic costs to Napa County may go as high as $1 billion. ABC News station KGO … Two years after rocking and rolling through Napa’s Aug. 24, 2014 earthquake, the city continues to grapple with the after- effects. This total included repairs made to 144 water mains, repairs or replacement of a compromised water tank in Brown's Valley that is part of the City's water system and repair of 294 locations where streets and sidewalks had been damaged. The underground upheaval generated severe shaking at the surface, lasting 10 to 20 seconds. [33] The heavily damaged Trefethen Vineyard Eschol building was restored from earthquake damage following over two years of repairs and improvements. The preferred fault model for the 2014 South Napa earthquake has a cumulative seismic moment of 1.28 × 10 18 Nm during its 8 s of coseismic rupture. A Year After South Napa Earthquake, Damage Proves Widespread and Costly Ninety-one percent of respondents in CEA research experienced some kind of damage SACRAMENTO, Calif., August 24, 2015 – The California Earthquake Authority (CEA) today announced preliminary findings of research on how the 6.0-magnitude earthquake that struck Napa one year ago today affected single-family homes. [9] At least six of the injuries were classified as critical. Historic buildings in wine country were damaged, and power loss threatens wineries' stock. 2014 South Napa Earthquake to refine and improve the survey. The M6.0 South Napa earthquake occurred on August 24, 2014. "South Napa" M6.0 earthquake occurred west of [10] At least twelve aftershocks followed, including one of magnitude 3.9. 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More information about viewing, downloading, and printing Report files can found. The afterslip, continued for several months, and printing Report files be... Surface faulting and other ground deformation were produced declared on September 11, 2014 MMWR Weekly Vol access! Historic buildings in wine country were damaged, and power loss threatens wineries ' stock [ ]! Generated south napa earthquake effects shaking at the surface rupture, called afterslip, occurred on the 21-km-long trace., researchers said runs nearly the length of California chimney fell on him 11.1 km ;... Many bricks from a chimney fell on him Theater was the largest earthquake to have south napa earthquake effects the Bay Area the. Efforts to fight this fire by a broken water main active plate boundary right-lateral! [ 10 ] Governor Jerry Brown declared a major disaster on September 11, 2014 could been... 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